The bottom of this cluster is clear as glass, there is virtually no matrix. So this entire cluster will light up radiantly if exhibited on a colored light stand. However this piece is displayed, it is outstanding, an unusual arrangement of points in an unusually nice & clear cluster. It is 5.75" long, 5" wide, stands 4.5" tall, & weighs 3 lb., 3 oz. (14.5 cm. X 12.5 cm., 1.44 kilo)